Request tweaks.
Request tweaks.

- Try and make method parameters one type when possible.
- Added a defaultEnv property so that defaults can be changed.
- Remove use of the _p qs in favour of PATH_INFO.
- Add a static current() method to access the currently dispatched route.
- Fix some bugs in globalEnvironment().
- Add an env() method to directly set the environment.
- Fix some code style.
- Change to MIT.
vanilla/garden